Options cover power levels from +33 to -70 dBm, all useful wavelengths, many connector styles including duplex / ribbon, and large core POF fiber. The KI 2600 Handheld Fiber Meter measures absolute or relative light levels and test tones in fiber optic systems. FOLS-201 optical light source is a fibre optic tester with exquisite appearance and ergonomic design. When combine with a power metre, the. A Fiber Optic Power Meter is the essential tool for measuring optical power within a fiber optic link. Multi-mode & Single-mode Fiber Optic Light Source with FC/LC/SC (PC/UPC) Adapters Designed to provide 850/1300 nm or.